Medela Breast Milk Bottles set includes 2 bottles designed specifically for collecting, storing and feeding breast milk. These BPA-free bottles are compatible with all Medela breast pumps and feature secure screw-on lids for leak-proof storage. Key features: • Compatible with all Medela breast pumps • BPA-free materials • Secure screw-on lids for leak-proof storage • Clear measurement markings • Dishwasher and microwave safe • Can be used for pumping, storing and feeding These bottles are part of Medela's comprehensive breastfeeding solution system. They can be used directly with breast pumps for collection, stored safely in the refrigerator or freezer, and used for feeding without needing to transfer milk between containers. The bottles feature durable construction and are easy to clean either by hand or in the dishwasher. The clear measurement markings help track milk volume accurately.